YOKOGAWA ZR22S, User Manual

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<11. Inspection and Maintenance>
11-11
To replace the fuse, follow these steps:
(1) Turn off the power to the converter for safe replacement.
(2) Remove the fuse from its holder. With the appropriate flat-blade screwdriver that just fits the
holder cap slot (Figure 11.7), turn the fuse holder cap 90° counterclockwise.
By doing so, you can remove the fuse together with the cap.
(3) Check the rating of the fuse and that it satisfies the following:
Maximum rated voltage: 250 V
Maximum rated current: 3.15 A
Type: Time-lag fuse
Standards: UL-, CSA- or VDE-approved
Part number: A1113EF
Place a new, properly rated fuse in the holder together with the cap, and push and turn the cap
clockwise 90° with the screwdriver to complete installation of the fuse.
Cap
Flat-blade
screwdriver
Fuse
Socket
F11-7E.ai
Figure 11.7 Removing the Fuse
11.2.2 Cleaning
Use a soft dry cloth to clean any part of the converter during inspection and maintenance.
11.2.3 Adjust LCD screen contrast
An LCD is built in the ZR402G converter. The contrast of this LCD is affected by its ambient
temperature. For this reason, the LCD is shipped, after adjusting the contrast so as to become
the most suitable in a room temperature(20-30°C). However, when display on the LCD is hard
to see, adjust the LCD contrast by change the resistance of the variable resistor; its position is
shown in Figure 11.8
Variable resistor
F11-8E.ai
Figure 11.8
IM 11M13A01-02E